var oWrap = document.getElementById('wrap')
    var oBtn = document.getElementsByClassName('btn')
    var oCon = document.getElementById('container')
    var oDiv = oCon.getElementsByTagName('div')
    for (var i = 0; i < oBtn.length; i++) {
      oBtn[i].index = i
      oBtn[i].onclick = function () {
        for (var j = 0; j < oBtn.length; j++) {
          oBtn[j].style.color = 'black'
		  oBtn[j].style.fontWeight="normal"
		  oBtn[j].style.borderRight="2px solid #858585"
          oDiv[j].style.display = 'none'
        }
        this.style.color = 'orange'
		this.style.fontWeight="bold"
		this.style.borderRight="5px solid #ff6f01"
        oDiv[this.index].style.display = 'block'
      }
    }